Consumers are being misled after research found one in five household products do not match their energy-efficiency claims, according to the Energy Standards Trust.
European Commission-funded research found that up to 20% of products - including ovens, fridges, washing machines and dishwashers - did not comply with energy-efficiency standards.
As a result, 10% of potential energy savings promised are missed by millions of products across Europe, the Trust said.
More top news
Emergency services have declared a "major incident" in Leicester following reports of an explosion.
Parts of the UK will feel colder than the Arctic Circle in the coming week as bitter winds make it feel -15C in some places.
At least three people have been killed in clashes in eastern Ghouta just hours after the UN Security Council backed a 30-day ceasefire.